[Note: I have not use the Edge Pro!]
I would think you’d need at least two stones to start, maybe three, depending on what your angles are from your sharpening guy. From my understanding, the Edge Pro has a limited range of bevel angle adjustment. If your sharpening guy has created bevels outside the range of the Edge Pro, then you’ll need to do a bit of regrinding to set new bevels.
But why? As a sharpener/maker, to me the Edge Pro seems like an overly complicated and expensive way to go. (Especially with this instruction on the Edge Pro site: “The Professional Edge Pro knife sharpener model is adjustable to work height, allowing you to stand straight and sharpen. This makes sharpening a blade for long hours more comfortable.” Wait, what? “sharpening a blade for long hours”?? I thought this was a quick-&-easy system?) Why not pick up a Spyderco Medium or Shapton 1000 grit ceramic stone (~$60) and an angle guide (~$10) and be done?
